Table 1: Number of Customers, Buyers and Response Rate by Purchase Probability Decile Bought "Art History of Florence?" Purchase Probability Deciles N Sum Mean 5000 1935 3870 5000 836 1672 5000 511 1022 5000 368 0736 5000 284 0568 5000 196 0392 5001 139 0278 4999 121 0242 5000 90 0180 10 5000 42 0084 Total 50000 4522 0904